src/vulkan/wsi/wsi_common_x11.c

   1 /*
   2  * Copyright © 2015 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <X11/Xlib-xcb.h>
  25 #include <X11/xshmfence.h>
  26 #include <xcb/xcb.h>
  27 #include <xcb/dri3.h>
  28 #include <xcb/present.h>
  29
  30 #include "util/macros.h"
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <unistd.h>
  34 #include <errno.h>
  35 #include <string.h>
  36
  37 #include "util/hash_table.h"
  38
  39 #include "wsi_common.h"
  40 #include "wsi_common_x11.h"
  41
  42 #define typed_memcpy(dest, src, count) ({ \
  43    static_assert(sizeof(*src) == sizeof(*dest), ""); \
  44    memcpy((dest), (src), (count) * sizeof(*(src))); \
  45 })
  46
  47 struct wsi_x11_connection {
  48    bool has_dri3;
  49    bool has_present;
  50 };
  51
  52 struct wsi_x11 {
  53    struct wsi_interface base;
  54
  55    pthread_mutex_t                              mutex;
  56    /* Hash table of xcb_connection -> wsi_x11_connection mappings */
  57    struct hash_table *connections;
  58 };
  59
  60 static struct wsi_x11_connection *
  61 wsi_x11_connection_create(const VkAllocationCallbacks *alloc,
  62                           xcb_connection_t *conn)
  63 {
  64    xcb_query_extension_cookie_t dri3_cookie, pres_cookie;
  65    xcb_query_extension_reply_t *dri3_reply, *pres_reply;
  66
  67    struct wsi_x11_connection *wsi_conn =
  68       vk_alloc(alloc, sizeof(*wsi_conn), 8,
  69                 VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
  70    if (!wsi_conn)
  71       return NULL;
  72
  73    dri3_cookie = xcb_query_extension(conn, 4, "DRI3");
  74    pres_cookie = xcb_query_extension(conn, 7, "PRESENT");
  75
  76    dri3_reply = xcb_query_extension_reply(conn, dri3_cookie, NULL);
  77    pres_reply = xcb_query_extension_reply(conn, pres_cookie, NULL);
  78    if (dri3_reply == NULL || pres_reply == NULL) {
  79       free(dri3_reply);
  80       free(pres_reply);
  81       vk_free(alloc, wsi_conn);
  82       return NULL;
  83    }
  84
  85    wsi_conn->has_dri3 = dri3_reply->present != 0;
  86    wsi_conn->has_present = pres_reply->present != 0;
  87
  88    free(dri3_reply);
  89    free(pres_reply);
  90
  91    return wsi_conn;
  92 }
  93
  94 static void
  95 wsi_x11_connection_destroy(const VkAllocationCallbacks *alloc,
  96                            struct wsi_x11_connection *conn)
  97 {
  98    vk_free(alloc, conn);
  99 }
 100
 101 static struct wsi_x11_connection *
 102 wsi_x11_get_connection(struct wsi_device *wsi_dev,
 103                        const VkAllocationCallbacks *alloc,
 104                        xcb_connection_t *conn)
 105 {
 106    struct wsi_x11 *wsi =
 107       (struct wsi_x11 *)wsi_dev->wsi[VK_ICD_WSI_PLATFORM_XCB];
 108
 109    pthread_mutex_lock(&wsi->mutex);
 110
 111    struct hash_entry *entry = _mesa_hash_table_search(wsi->connections, conn);
 112    if (!entry) {
 113       /* We're about to make a bunch of blocking calls.  Let's drop the
 114        * mutex for now so we don't block up too badly.
 115        */
 116       pthread_mutex_unlock(&wsi->mutex);
 117
 118       struct wsi_x11_connection *wsi_conn =
 119          wsi_x11_connection_create(alloc, conn);
 120
 121       pthread_mutex_lock(&wsi->mutex);
 122
 123       entry = _mesa_hash_table_search(wsi->connections, conn);
 124       if (entry) {
 125          /* Oops, someone raced us to it */
 126          wsi_x11_connection_destroy(alloc, wsi_conn);
 127       } else {
 128          entry = _mesa_hash_table_insert(wsi->connections, conn, wsi_conn);
 129       }
 130    }
 131
 132    pthread_mutex_unlock(&wsi->mutex);
 133
 134    return entry->data;
 135 }
 136
 137 static const VkSurfaceFormatKHR formats[] = {
 138    { .format = VK_FORMAT_B8G8R8A8_SRGB, },
 139    { .format = VK_FORMAT_B8G8R8A8_UNORM, },
 140 };
 141
 142 static const VkPresentModeKHR present_modes[] = {
 143    VK_PRESENT_MODE_MAILBOX_KHR,
 144 };
 145
 146 static xcb_screen_t *
 147 get_screen_for_root(xcb_connection_t *conn, xcb_window_t root)
 148 {
 149    xcb_screen_iterator_t screen_iter =
 150       xcb_setup_roots_iterator(xcb_get_setup(conn));
 151
 152    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 153       if (screen_iter.data->root == root)
 154          return screen_iter.data;
 155    }
 156
 157    return NULL;
 158 }
 159
 160 static xcb_visualtype_t *
 161 screen_get_visualtype(xcb_screen_t *screen, xcb_visualid_t visual_id,
 162                       unsigned *depth)
 163 {
 164    xcb_depth_iterator_t depth_iter =
 165       xcb_screen_allowed_depths_iterator(screen);
 166
 167    for (; depth_iter.rem; xcb_depth_next (&depth_iter)) {
 168       xcb_visualtype_iterator_t visual_iter =
 169          xcb_depth_visuals_iterator (depth_iter.data);
 170
 171       for (; visual_iter.rem; xcb_visualtype_next (&visual_iter)) {
 172          if (visual_iter.data->visual_id == visual_id) {
 173             if (depth)
 174                *depth = depth_iter.data->depth;
 175             return visual_iter.data;
 176          }
 177       }
 178    }
 179
 180    return NULL;
 181 }
 182
 183 static xcb_visualtype_t *
 184 connection_get_visualtype(xcb_connection_t *conn, xcb_visualid_t visual_id,
 185                           unsigned *depth)
 186 {
 187    xcb_screen_iterator_t screen_iter =
 188       xcb_setup_roots_iterator(xcb_get_setup(conn));
 189
 190    /* For this we have to iterate over all of the screens which is rather
 191     * annoying.  Fortunately, there is probably only 1.
 192     */
 193    for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
 194       xcb_visualtype_t *visual = screen_get_visualtype(screen_iter.data,
 195                                                        visual_id, depth);
 196       if (visual)
 197          return visual;
 198    }
 199
 200    return NULL;
 201 }
 202
 203 static xcb_visualtype_t *
 204 get_visualtype_for_window(xcb_connection_t *conn, xcb_window_t window,
 205                           unsigned *depth)
 206 {
 207    xcb_query_tree_cookie_t tree_cookie;
 208    xcb_get_window_attributes_cookie_t attrib_cookie;
 209    xcb_query_tree_reply_t *tree;
 210    xcb_get_window_attributes_reply_t *attrib;
 211
 212    tree_cookie = xcb_query_tree(conn, window);
 213    attrib_cookie = xcb_get_window_attributes(conn, window);
 214
 215    tree = xcb_query_tree_reply(conn, tree_cookie, NULL);
 216    attrib = xcb_get_window_attributes_reply(conn, attrib_cookie, NULL);
 217    if (attrib == NULL || tree == NULL) {
 218       free(attrib);
 219       free(tree);
 220       return NULL;
 221    }
 222
 223    xcb_window_t root = tree->root;
 224    xcb_visualid_t visual_id = attrib->visual;
 225    free(attrib);
 226    free(tree);
 227
 228    xcb_screen_t *screen = get_screen_for_root(conn, root);
 229    if (screen == NULL)
 230       return NULL;
 231
 232    return screen_get_visualtype(screen, visual_id, depth);
 233 }
 234
 235 static bool
 236 visual_has_alpha(xcb_visualtype_t *visual, unsigned depth)
 237 {
 238    uint32_t rgb_mask = visual->red_mask |
 239                        visual->green_mask |
 240                        visual->blue_mask;
 241
 242    uint32_t all_mask = 0xffffffff >> (32 - depth);
 243
 244    /* Do we have bits left over after RGB? */
 245    return (all_mask & ~rgb_mask) != 0;
 246 }
 247
 248 VkBool32 wsi_get_physical_device_xcb_presentation_support(
 249     struct wsi_device *wsi_device,
 250     VkAllocationCallbacks *alloc,
 251     uint32_t                                    queueFamilyIndex,
 252     xcb_connection_t*                           connection,
 253     xcb_visualid_t                              visual_id)
 254 {
 255    struct wsi_x11_connection *wsi_conn =
 256       wsi_x11_get_connection(wsi_device, alloc, connection);
 257
 258    if (!wsi_conn->has_dri3) {
 259       fprintf(stderr, "vulkan: No DRI3 support\n");
 260       return false;
 261    }
 262
 263    unsigned visual_depth;
 264    if (!connection_get_visualtype(connection, visual_id, &visual_depth))
 265       return false;
 266
 267    if (visual_depth != 24 && visual_depth != 32)
 268       return false;
 269
 270    return true;
 271 }
 272
 273 static xcb_connection_t*
 274 x11_surface_get_connection(VkIcdSurfaceBase *icd_surface)
 275 {
 276    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 277       return XGetXCBConnection(((VkIcdSurfaceXlib *)icd_surface)->dpy);
 278    else
 279       return ((VkIcdSurfaceXcb *)icd_surface)->connection;
 280 }
 281
 282 static xcb_window_t
 283 x11_surface_get_window(VkIcdSurfaceBase *icd_surface)
 284 {
 285    if (icd_surface->platform == VK_ICD_WSI_PLATFORM_XLIB)
 286       return ((VkIcdSurfaceXlib *)icd_surface)->window;
 287    else
 288       return ((VkIcdSurfaceXcb *)icd_surface)->window;
 289 }
 290
 291 static VkResult
 292 x11_surface_get_support(VkIcdSurfaceBase *icd_surface,
 293                         struct wsi_device *wsi_device,
 294                         const VkAllocationCallbacks *alloc,
 295                         uint32_t queueFamilyIndex,
 296                         VkBool32* pSupported)
 297 {
 298    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 299    xcb_window_t window = x11_surface_get_window(icd_surface);
 300
 301    struct wsi_x11_connection *wsi_conn =
 302       wsi_x11_get_connection(wsi_device, alloc, conn);
 303    if (!wsi_conn)
 304       return VK_ERROR_OUT_OF_HOST_MEMORY;
 305
 306    if (!wsi_conn->has_dri3) {
 307       fprintf(stderr, "vulkan: No DRI3 support\n");
 308       *pSupported = false;
 309       return VK_SUCCESS;
 310    }
 311
 312    unsigned visual_depth;
 313    if (!get_visualtype_for_window(conn, window, &visual_depth)) {
 314       *pSupported = false;
 315       return VK_SUCCESS;
 316    }
 317
 318    if (visual_depth != 24 && visual_depth != 32) {
 319       *pSupported = false;
 320       return VK_SUCCESS;
 321    }
 322
 323    *pSupported = true;
 324    return VK_SUCCESS;
 325 }
 326
 327 static VkResult
 328 x11_surface_get_capabilities(VkIcdSurfaceBase *icd_surface,
 329                              VkSurfaceCapabilitiesKHR *caps)
 330 {
 331    xcb_connection_t *conn = x11_surface_get_connection(icd_surface);
 332    xcb_window_t window = x11_surface_get_window(icd_surface);
 333    xcb_get_geometry_cookie_t geom_cookie;
 334    xcb_generic_error_t *err;
 335    xcb_get_geometry_reply_t *geom;
 336    unsigned visual_depth;
 337
 338    geom_cookie = xcb_get_geometry(conn, window);
 339
 340    /* This does a round-trip.  This is why we do get_geometry first and
 341     * wait to read the reply until after we have a visual.
 342     */
 343    xcb_visualtype_t *visual =
 344       get_visualtype_for_window(conn, window, &visual_depth);
 345
 346    geom = xcb_get_geometry_reply(conn, geom_cookie, &err);
 347    if (geom) {
 348       VkExtent2D extent = { geom->width, geom->height };
 349       caps->currentExtent = extent;
 350       caps->minImageExtent = extent;
 351       caps->maxImageExtent = extent;
 352    } else {
 353       /* This can happen if the client didn't wait for the configure event
 354        * to come back from the compositor.  In that case, we don't know the
 355        * size of the window so we just return valid "I don't know" stuff.
 356        */
 357       caps->currentExtent = (VkExtent2D) { -1, -1 };
 358       caps->minImageExtent = (VkExtent2D) { 1, 1 };
 359       caps->maxImageExtent = (VkExtent2D) { INT16_MAX, INT16_MAX };
 360    }
 361    free(err);
 362    free(geom);
 363
 364    if (visual_has_alpha(visual, visual_depth)) {
 365       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 366                                       VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR;
 367    } else {
 368       caps->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR |
 369                                       VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
 370    }
 371
 372    caps->minImageCount = 2;
 373    caps->maxImageCount = 4;
 374    caps->supportedTransforms = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 375    caps->currentTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 376    caps->maxImageArrayLayers = 1;
 377    caps->supportedUsageFlags =
 378       VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
 379       VK_IMAGE_USAGE_SAMPLED_BIT |
 380       VK_IMAGE_USAGE_TRANSFER_DST_BIT |
 381       VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 382
 383    return VK_SUCCESS;
 384 }
 385
 386 static VkResult
 387 x11_surface_get_formats(VkIcdSurfaceBase *surface,
 388                         struct wsi_device *wsi_device,
 389                         uint32_t *pSurfaceFormatCount,
 390                         VkSurfaceFormatKHR *pSurfaceFormats)
 391 {
 392    if (pSurfaceFormats == NULL) {
 393       *pSurfaceFormatCount = ARRAY_SIZE(formats);
 394       return VK_SUCCESS;
 395    }
 396
 397    assert(*pSurfaceFormatCount >= ARRAY_SIZE(formats));
 398    typed_memcpy(pSurfaceFormats, formats, *pSurfaceFormatCount);
 399    *pSurfaceFormatCount = ARRAY_SIZE(formats);
 400
 401    return VK_SUCCESS;
 402 }
 403
 404 static VkResult
 405 x11_surface_get_present_modes(VkIcdSurfaceBase *surface,
 406                               uint32_t *pPresentModeCount,
 407                               VkPresentModeKHR *pPresentModes)
 408 {
 409    if (pPresentModes == NULL) {
 410       *pPresentModeCount = ARRAY_SIZE(present_modes);
 411       return VK_SUCCESS;
 412    }
 413
 414    assert(*pPresentModeCount >= ARRAY_SIZE(present_modes));
 415    typed_memcpy(pPresentModes, present_modes, *pPresentModeCount);
 416    *pPresentModeCount = ARRAY_SIZE(present_modes);
 417
 418    return VK_SUCCESS;
 419 }
 420
 421 VkResult wsi_create_xcb_surface(const VkAllocationCallbacks *pAllocator,
 422                                 const VkXcbSurfaceCreateInfoKHR *pCreateInfo,
 423                                 VkSurfaceKHR *pSurface)
 424 {
 425    VkIcdSurfaceXcb *surface;
 426
 427    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 428                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 429    if (surface == NULL)
 430       return VK_ERROR_OUT_OF_HOST_MEMORY;
 431
 432    surface->base.platform = VK_ICD_WSI_PLATFORM_XCB;
 433    surface->connection = pCreateInfo->connection;
 434    surface->window = pCreateInfo->window;
 435
 436    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 437    return VK_SUCCESS;
 438 }
 439
 440 VkResult wsi_create_xlib_surface(const VkAllocationCallbacks *pAllocator,
 441                                  const VkXlibSurfaceCreateInfoKHR *pCreateInfo,
 442                                  VkSurfaceKHR *pSurface)
 443 {
 444    VkIcdSurfaceXlib *surface;
 445
 446    surface = vk_alloc(pAllocator, sizeof *surface, 8,
 447                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 448    if (surface == NULL)
 449       return VK_ERROR_OUT_OF_HOST_MEMORY;
 450
 451    surface->base.platform = VK_ICD_WSI_PLATFORM_XLIB;
 452    surface->dpy = pCreateInfo->dpy;
 453    surface->window = pCreateInfo->window;
 454
 455    *pSurface = _VkIcdSurfaceBase_to_handle(&surface->base);
 456    return VK_SUCCESS;
 457 }
 458
 459 struct x11_image {
 460    VkImage image;
 461    VkDeviceMemory memory;
 462    xcb_pixmap_t                              pixmap;
 463    bool                                      busy;
 464    struct xshmfence *                        shm_fence;
 465    uint32_t                                  sync_fence;
 466 };
 467
 468 struct x11_swapchain {
 469    struct wsi_swapchain                        base;
 470
 471    xcb_connection_t *                           conn;
 472    xcb_window_t                                 window;
 473    xcb_gc_t                                     gc;
 474    VkExtent2D                                   extent;
 475    uint32_t                                     image_count;
 476
 477    xcb_present_event_t                          event_id;
 478    xcb_special_event_t *                        special_event;
 479    uint64_t                                     send_sbc;
 480    uint32_t                                     stamp;
 481
 482    struct x11_image                             images[0];
 483 };
 484
 485 static VkResult
 486 x11_get_images(struct wsi_swapchain *anv_chain,
 487                uint32_t* pCount, VkImage *pSwapchainImages)
 488 {
 489    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 490
 491    if (pSwapchainImages == NULL) {
 492       *pCount = chain->image_count;
 493       return VK_SUCCESS;
 494    }
 495
 496    assert(chain->image_count <= *pCount);
 497    for (uint32_t i = 0; i < chain->image_count; i++)
 498       pSwapchainImages[i] = chain->images[i].image;
 499
 500    *pCount = chain->image_count;
 501
 502    return VK_SUCCESS;
 503 }
 504
 505 static VkResult
 506 x11_handle_dri3_present_event(struct x11_swapchain *chain,
 507                               xcb_present_generic_event_t *event)
 508 {
 509    switch (event->evtype) {
 510    case XCB_PRESENT_CONFIGURE_NOTIFY: {
 511       xcb_present_configure_notify_event_t *config = (void *) event;
 512
 513       if (config->width != chain->extent.width ||
 514           config->height != chain->extent.height)
 515          return VK_ERROR_OUT_OF_DATE_KHR;
 516
 517       break;
 518    }
 519
 520    case XCB_PRESENT_EVENT_IDLE_NOTIFY: {
 521       xcb_present_idle_notify_event_t *idle = (void *) event;
 522
 523       for (unsigned i = 0; i < chain->image_count; i++) {
 524          if (chain->images[i].pixmap == idle->pixmap) {
 525             chain->images[i].busy = false;
 526             break;
 527          }
 528       }
 529
 530       break;
 531    }
 532
 533    case XCB_PRESENT_COMPLETE_NOTIFY:
 534    default:
 535       break;
 536    }
 537
 538    return VK_SUCCESS;
 539 }
 540
 541 static VkResult
 542 x11_acquire_next_image(struct wsi_swapchain *anv_chain,
 543                        uint64_t timeout,
 544                        VkSemaphore semaphore,
 545                        uint32_t *image_index)
 546 {
 547    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 548
 549    while (1) {
 550       for (uint32_t i = 0; i < chain->image_count; i++) {
 551          if (!chain->images[i].busy) {
 552             /* We found a non-busy image */
 553             xshmfence_await(chain->images[i].shm_fence);
 554             *image_index = i;
 555             chain->images[i].busy = true;
 556             return VK_SUCCESS;
 557          }
 558       }
 559
 560       xcb_flush(chain->conn);
 561       xcb_generic_event_t *event =
 562          xcb_wait_for_special_event(chain->conn, chain->special_event);
 563       if (!event)
 564          return VK_ERROR_OUT_OF_DATE_KHR;
 565
 566       VkResult result = x11_handle_dri3_present_event(chain, (void *)event);
 567       free(event);
 568       if (result != VK_SUCCESS)
 569          return result;
 570    }
 571 }
 572
 573 static VkResult
 574 x11_queue_present(struct wsi_swapchain *anv_chain,
 575                   uint32_t image_index)
 576 {
 577    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 578    struct x11_image *image = &chain->images[image_index];
 579
 580    assert(image_index < chain->image_count);
 581
 582    uint32_t options = XCB_PRESENT_OPTION_NONE;
 583
 584    int64_t target_msc = 0;
 585    int64_t divisor = 0;
 586    int64_t remainder = 0;
 587
 588    options |= XCB_PRESENT_OPTION_ASYNC;
 589
 590    xshmfence_reset(image->shm_fence);
 591
 592    ++chain->send_sbc;
 593    xcb_void_cookie_t cookie =
 594       xcb_present_pixmap(chain->conn,
 595                          chain->window,
 596                          image->pixmap,
 597                          (uint32_t) chain->send_sbc,
 598                          0,                                    /* valid */
 599                          0,                                    /* update */
 600                          0,                                    /* x_off */
 601                          0,                                    /* y_off */
 602                          XCB_NONE,                             /* target_crtc */
 603                          XCB_NONE,
 604                          image->sync_fence,
 605                          options,
 606                          target_msc,
 607                          divisor,
 608                          remainder, 0, NULL);
 609    xcb_discard_reply(chain->conn, cookie.sequence);
 610    image->busy = true;
 611
 612    xcb_flush(chain->conn);
 613
 614    return VK_SUCCESS;
 615 }
 616
 617 static VkResult
 618 x11_image_init(VkDevice device_h, struct x11_swapchain *chain,
 619                const VkSwapchainCreateInfoKHR *pCreateInfo,
 620                const VkAllocationCallbacks* pAllocator,
 621                struct x11_image *image)
 622 {
 623    xcb_void_cookie_t cookie;
 624    VkResult result;
 625    uint32_t row_pitch;
 626    uint32_t offset;
 627    uint32_t bpp = 32;
 628    uint32_t depth = 24;
 629    int fd;
 630    uint32_t size;
 631
 632    result = chain->base.image_fns->create_wsi_image(device_h,
 633                                                     pCreateInfo,
 634                                                     pAllocator,
 635                                                     &image->image,
 636                                                     &image->memory,
 637                                                     &size,
 638                                                     &offset,
 639                                                     &row_pitch,
 640                                                     &fd);
 641    if (result != VK_SUCCESS)
 642       return result;
 643
 644    image->pixmap = xcb_generate_id(chain->conn);
 645
 646    cookie =
 647       xcb_dri3_pixmap_from_buffer_checked(chain->conn,
 648                                           image->pixmap,
 649                                           chain->window,
 650                                           size,
 651                                           pCreateInfo->imageExtent.width,
 652                                           pCreateInfo->imageExtent.height,
 653                                           row_pitch,
 654                                           depth, bpp, fd);
 655    xcb_discard_reply(chain->conn, cookie.sequence);
 656
 657    int fence_fd = xshmfence_alloc_shm();
 658    if (fence_fd < 0)
 659       goto fail_pixmap;
 660
 661    image->shm_fence = xshmfence_map_shm(fence_fd);
 662    if (image->shm_fence == NULL)
 663       goto fail_shmfence_alloc;
 664
 665    image->sync_fence = xcb_generate_id(chain->conn);
 666    xcb_dri3_fence_from_fd(chain->conn,
 667                           image->pixmap,
 668                           image->sync_fence,
 669                           false,
 670                           fence_fd);
 671
 672    image->busy = false;
 673    xshmfence_trigger(image->shm_fence);
 674
 675    return VK_SUCCESS;
 676
 677 fail_shmfence_alloc:
 678    close(fence_fd);
 679
 680 fail_pixmap:
 681    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 682    xcb_discard_reply(chain->conn, cookie.sequence);
 683
 684    chain->base.image_fns->free_wsi_image(device_h, pAllocator,
 685                                         image->image, image->memory);
 686
 687    return result;
 688 }
 689
 690 static void
 691 x11_image_finish(struct x11_swapchain *chain,
 692                  const VkAllocationCallbacks* pAllocator,
 693                  struct x11_image *image)
 694 {
 695    xcb_void_cookie_t cookie;
 696
 697    cookie = xcb_sync_destroy_fence(chain->conn, image->sync_fence);
 698    xcb_discard_reply(chain->conn, cookie.sequence);
 699    xshmfence_unmap_shm(image->shm_fence);
 700
 701    cookie = xcb_free_pixmap(chain->conn, image->pixmap);
 702    xcb_discard_reply(chain->conn, cookie.sequence);
 703
 704    chain->base.image_fns->free_wsi_image(chain->base.device, pAllocator,
 705                                         image->image, image->memory);
 706 }
 707
 708 static VkResult
 709 x11_swapchain_destroy(struct wsi_swapchain *anv_chain,
 710                       const VkAllocationCallbacks *pAllocator)
 711 {
 712    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
 713    for (uint32_t i = 0; i < chain->image_count; i++)
 714       x11_image_finish(chain, pAllocator, &chain->images[i]);
 715
 716    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 717
 718    vk_free(pAllocator, chain);
 719
 720    return VK_SUCCESS;
 721 }
 722
 723 static VkResult
 724 x11_surface_create_swapchain(VkIcdSurfaceBase *icd_surface,
 725                              VkDevice device,
 726                              struct wsi_device *wsi_device,
 727                              const VkSwapchainCreateInfoKHR *pCreateInfo,
 728                              const VkAllocationCallbacks* pAllocator,
 729                              const struct wsi_image_fns *image_fns,
 730                              struct wsi_swapchain **swapchain_out)
 731 {
 732    struct x11_swapchain *chain;
 733    xcb_void_cookie_t cookie;
 734    VkResult result;
 735
 736    assert(pCreateInfo->sType == VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR);
 737
 738    int num_images = pCreateInfo->minImageCount;
 739
 740    /* For true mailbox mode, we need at least 4 images:
 741     *  1) One to scan out from
 742     *  2) One to have queued for scan-out
 743     *  3) One to be currently held by the Wayland compositor
 744     *  4) One to render to
 745     */
 746    if (pCreateInfo->presentMode == VK_PRESENT_MODE_MAILBOX_KHR)
 747       num_images = MAX2(num_images, 4);
 748
 749    size_t size = sizeof(*chain) + num_images * sizeof(chain->images[0]);
 750    chain = vk_alloc(pAllocator, size, 8,
 751                       VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
 752    if (chain == NULL)
 753       return VK_ERROR_OUT_OF_HOST_MEMORY;
 754
 755    chain->base.device = device;
 756    chain->base.destroy = x11_swapchain_destroy;
 757    chain->base.get_images = x11_get_images;
 758    chain->base.acquire_next_image = x11_acquire_next_image;
 759    chain->base.queue_present = x11_queue_present;
 760    chain->base.image_fns = image_fns;
 761    chain->conn = x11_surface_get_connection(icd_surface);
 762    chain->window = x11_surface_get_window(icd_surface);
 763    chain->extent = pCreateInfo->imageExtent;
 764    chain->image_count = num_images;
 765    chain->send_sbc = 0;
 766
 767    chain->event_id = xcb_generate_id(chain->conn);
 768    xcb_present_select_input(chain->conn, chain->event_id, chain->window,
 769                             XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
 770                             XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
 771                             XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
 772
 773    /* Create an XCB event queue to hold present events outside of the usual
 774     * application event queue
 775     */
 776    chain->special_event =
 777       xcb_register_for_special_xge(chain->conn, &xcb_present_id,
 778                                    chain->event_id, NULL);
 779
 780    chain->gc = xcb_generate_id(chain->conn);
 781    if (!chain->gc) {
 782       /* FINISHME: Choose a better error. */
 783       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 784       goto fail_register;
 785    }
 786
 787    cookie = xcb_create_gc(chain->conn,
 788                           chain->gc,
 789                           chain->window,
 790                           XCB_GC_GRAPHICS_EXPOSURES,
 791                           (uint32_t []) { 0 });
 792    xcb_discard_reply(chain->conn, cookie.sequence);
 793
 794    uint32_t image = 0;
 795    for (; image < chain->image_count; image++) {
 796       result = x11_image_init(device, chain, pCreateInfo, pAllocator,
 797                               &chain->images[image]);
 798       if (result != VK_SUCCESS)
 799          goto fail_init_images;
 800    }
 801
 802    *swapchain_out = &chain->base;
 803
 804    return VK_SUCCESS;
 805
 806 fail_init_images:
 807    for (uint32_t j = 0; j < image; j++)
 808       x11_image_finish(chain, pAllocator, &chain->images[j]);
 809
 810 fail_register:
 811    xcb_unregister_for_special_event(chain->conn, chain->special_event);
 812
 813    vk_free(pAllocator, chain);
 814
 815    return result;
 816 }
 817
 818 VkResult
 819 wsi_x11_init_wsi(struct wsi_device *wsi_device,
 820                  const VkAllocationCallbacks *alloc)
 821 {
 822    struct wsi_x11 *wsi;
 823    VkResult result;
 824
 825    wsi = vk_alloc(alloc, sizeof(*wsi), 8,
 826                    VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
 827    if (!wsi) {
 828       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 829       goto fail;
 830    }
 831
 832    int ret = pthread_mutex_init(&wsi->mutex, NULL);
 833    if (ret != 0) {
 834       if (ret == ENOMEM) {
 835          result = VK_ERROR_OUT_OF_HOST_MEMORY;
 836       } else {
 837          /* FINISHME: Choose a better error. */
 838          result = VK_ERROR_OUT_OF_HOST_MEMORY;
 839       }
 840
 841       goto fail_alloc;
 842    }
 843
 844    wsi->connections = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
 845                                               _mesa_key_pointer_equal);
 846    if (!wsi->connections) {
 847       result = VK_ERROR_OUT_OF_HOST_MEMORY;
 848       goto fail_mutex;
 849    }
 850
 851    wsi->base.get_support = x11_surface_get_support;
 852    wsi->base.get_capabilities = x11_surface_get_capabilities;
 853    wsi->base.get_formats = x11_surface_get_formats;
 854    wsi->base.get_present_modes = x11_surface_get_present_modes;
 855    wsi->base.create_swapchain = x11_surface_create_swapchain;
 856
 857    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = &wsi->base;
 858    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = &wsi->base;
 859
 860    return VK_SUCCESS;
 861
 862 fail_mutex:
 863    pthread_mutex_destroy(&wsi->mutex);
 864 fail_alloc:
 865    vk_free(alloc, wsi);
 866 fail:
 867    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB] = NULL;
 868    wsi_device->wsi[VK_ICD_WSI_PLATFORM_XLIB] = NULL;
 869
 870    return result;
 871 }
 872
 873 void
 874 wsi_x11_finish_wsi(struct wsi_device *wsi_device,
 875                    const VkAllocationCallbacks *alloc)
 876 {
 877    struct wsi_x11 *wsi =
 878       (struct wsi_x11 *)wsi_device->wsi[VK_ICD_WSI_PLATFORM_XCB];
 879
 880    if (wsi) {
 881       _mesa_hash_table_destroy(wsi->connections, NULL);
 882
 883       pthread_mutex_destroy(&wsi->mutex);
 884
 885       vk_free(alloc, wsi);
 886    }
 887 }